HELP on sudoers

Hi all,
I can't seem to find enough resources to write a good sudoers file.
Could someone please help me with the syntax. I've figured out the basic
things like giving a user or two access to a few commands. But I need to know
more, like how to disable the mailing option so that sudo does'nt send a mail
to root everytime a non-sudoer tries it, and INSTEAD have it logged to a
file.
A few example sudoers lists (other than the one given in the man file) would
be much appreciated.
Thanks in advance,
Ravi Shankar
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